ATC_MiThermometer VS Adafruit_CircuitPython_AdafruitIO

I want to do a little IOT project where I establish a MQQT-Broker on my Raspberry Pi and send it readings from my measurement devices (xiaomi Mijia-LYWSD03MMC). The plan is for these devices to connect to my ESP32, allowing me to transfer data to the broker on the Pi. I've successfully connected my ESP32 to my Wi-Fi and to my broker, but I'm experiencing significant difficulties in connecting it to my two measurement devices. I have essentially followed the instructions provided in this GitHub repository (https://github.com/atc1441/ATC_MiThermometer) as best as I could. I also checked some other repos but they didn't really help me as they were too big/complex...

If you get off WiFi and on Bluetooth: https://github.com/atc1441/ATC_MiThermometer They last a year with a single CR2032 which is hard to do with WiFi.

I then copied this Python script to the Raspberry Pi 4 and was able to read the temperature and humidity! (https://github.com/atc1441/ATC_MiThermometer/tree/master/contrib/python)

I’m using 16pcs Xiaomi Thermometer LYWSD03MMC BLE thermometer around the house with custom ROM from here https://github.com/atc1441/ATC_MiThermometer

I use the Xiaomi (pronounced Show Me) Mi Temperature and Humidity monitors (version 2) and flash the firmware with a 'open source' version (here or the older one here). I've found battery life good (8 months + with the newer software on one sensor) and bar from one corrupt display (right next to an outdoor electricity feed - well the box is handy and dry) then they have just run and run and run.

The thermometers in screenshot are Xiaomi Thermometer LYWSD03MMC with ATC custom firmware. Their bluetooth broadcast data collected by some cheap chinese ESP32 board and ESPHome addon in Home Assistant.

You can replace their firmware with one which is more open and broadcasts the values without needing to connect to the device: https://github.com/atc1441/ATC_MiThermometer

Is a service like https://io.adafruit.com an option for what's necessary remotely?

To connect to Adafruit.io, you will to get an account with https://io.adafruit.com and store your username and password in the settings as the IO_USERNAME and IO_KEY keys (make sure your key is in env.local). Also create a feed and update the feed key in the example below.

There are lots of them! For example, https://io.adafruit.com

I've been using Adafruits https://io.adafruit.com for graphing but it's easy to hit their free limit and I miss the historic data and ease program of access.

MQTT for bi-directional Cloud control & data display (AdafruitIO for now),

Check out adafruit IO: https://io.adafruit.com/

use UMQTT (io.adafruit.com) to report soil moisture and water level in the jar :)

See http://io.adafruit.com

2nd - I used https://io.adafruit.com/ to monitor the system. My goal was not to alert me via text/email but rather to allow me to see the door's position and send a command to open/close the door via the app.

I use Adafruit IO. You can publish values via MQTT (or HTTP if you like) and view graphs etc on the website. https://io.adafruit.com/